Screening mechanism



C.C.RUPRECHT SCREENING MECHANISM March 4, 1924.

Filed May 4, 1922 2 SheetsSheet 1 March 4, 1924.

Patented Mar. 4, i924.

CW 0. BUPBECH'I', F OLMSTED, ILLINOIS.

scnn'nnme Application filed Kay 4,

To all whom it may concern: f

Be it known that I, Cannes 0. Rurnnon'r,

a .citizen oftheUm'ted States, residing at Olmsted, in the county of Pulaski and. State 6 of Illinois, have invented a certain new and useful Im'irovement in Screenin Mechanism,.of w ch'the following is a ull, clear, and enact" description, reference being had to vthe accompanying drawings.

This invention relates to apparatus for screening materials and has for its general object to provide an apparatus of this char acter which is particularly efiicient in opera tion, the construction and arrangement of parts shown herein securing a very active screening; action-:yvhile securing and main taining t e distribution of the material. over the screen. further object of the invention ,is to providea screen of this character with an eflicientifmeans for operating the same electrically. .Further and more limited objects of the invention will appear hereinafter and will be realized in and through the construction and arrangement of parts described in the specification and embodied in the combinations of elements recited in the claimsihereto annexed."

In the drawings, which shown the present preferred embodiment of my invention, Fig.

so 1 represents a front elevational view of a screenin apparatusconstructed in accord ance wit my invention;.Fig. 2 a sectional elevation of such-*inechanism; Fig. 3 a sec tionaldetail corresponding to the iine 3 -3 of Fig. 2; Fig.4 a diagrammatic detail illustrating the action of the screen shown in the views; Fig. 5 a view, similar to ig. 3, sowing a sh ht modification in the manner of mounting t e movable port on of thescreening mechanism; Fig. 6 a view similar to Fig. '4, of a further modififi i g-la dlagrammatic detail illus tratin the action 0 the screening mechaown in 6; Fig. 8 a detail in sectiolial elevatiqn of a modification of the screenfgnounti: ;'and Fig. 9 a diagrammatic illustration 0f 16 electrical means for operating theiscreen.

Describing by reference characters the various parts illustrated herein, 1 denotes theinclined side rails, 2 the tranverse bot tom rail, and 3 the transverse top rail of .-a frame in which the screen roper is located. Projecting inwardly m each of the rails 1 is a pair of lugs 4, one pair MECHANISM.

1922. serial no. 553,421

, being located near the-top, of each of the rails and the other pair bein located near the bottom. Each pair .of ugs} supports a journal pin 5. 'Each pin has journaled thereupon the outer end of a 6, the inner end of each of said ,links being journaled in like manner upon a pin '2' mounted in lugs 8 projecting outwardly from the side rails 9 of the screen proper. The side rails 9 are shown as extending within and parallel to the sides 1- -1 and are connected by top and bottom cross rails 10, and 13"., the upper cross rail being recessed, as indicated at 11, for the reception of the lower end of an intake chute 12, which may be conveniently mounted uponthe cross rail 3 of the supporting frame. Y

To the bottoms. of the'longitudinal rails 9 and the cross rails 10 and ll of the screen there is applied a wire mesh 18 constituting the active screening surface. The arrangement of the lugs 4; and i" and the lengths of the links-6 are preferably such that the screen will be supported from its surrounding framework with Ithe links normall extending both downwardly and inward as shown in Fig. 3. The purpose and o ject of sup orting the screen in this manner will he exp ained hereinafter.

For the purpose of agitating the screen,

I preferably employ the electrical ap arao tus shown herein, said apparatus compnsing an electromagnet 14 mounted in each of the side rails 1 of the sup ortin frame and each havin its poles directe toward the adjacent si e rail 9 of the screen. Each of the latter side rails is provided with an armature 15 whereby, by energizing the said ma nets alternately, the screen will be oscillate laterally on its links 6.

For the purpose of oscillating the screen, each magnet may be energized in turn by an apparatus shown conventionally in Fi 9, wherein 16 denotes a conductor leading -om any source of electrical energy (as amain supply, line.) and electrically connected to the shaft 17 of a rotating contactor 18 havin a segmental contact 19 which is electrica y connected with the shaft 17. Thesegmental contact 19 is preferably 180 in extent. Current supplied to the conductor 16 will be delivered from the contact shaft 17 to the contact 19 and thence alternately to each of the magnets 14 by the wires 20 and 21 and from each of said magnets by means 110 of wires or conductors 22 and 23 back to the main line. The contacts 20' and 21 will be of sufficient width to lap1 slightly upon the contact segment 19, so t at one magnet will out in before the other is entirely cut off, thus obviating sparking.

Light helical springs 24 are preferably connected with the side rails 9 of the screen and are provided with adjusting stems 25 extendin through the side rails 1 and provided with wing nuts 26. These springs tend to check and cushion the lateralmovements of the screen.

Reference has been made hereinbefore to the manner of mounting the screen frame within the supporting frame. The preferred manner of mounting is shown in Figs. 3 and 4, wherein the width of the screen frame as compared with the width of its supporting frame is such that the lower ends of the links 6 project inwardly and preferably downwardly. When the screen is oscil-.

lated by energizing the magnets in conjunction with the rotating contactor, the .movement imparted to the screen as the latter swings toward the right will cause the lifting of the left hand side of the screen and the depression of the right hand side thereof. When the screen moves in the opposite direction, the reverse action occurs; that is to say, the right hand side of the screen will be lifted and the left hand side lowered. There is practically no vertical movement of the central portion of the screen, as will be evident from Fig. 4. The action u on the material being screened isto keep tlie same distributed over the active screening surface while the up and down .motion of each side of the screen tends to throw the material upwardly and to catch and hit the same as it falls. This results in a very effective screening action.

In Fig. 5 there is shown a modification of the manner of mounting the screen wherein the results obtained are substantially the same as those which are obtained by the mounting shown in Figs. 1-4 inclusive. In this view, the links 6 pro'ect inwardly from the side rails 1 but exten upwardly instead of downwardly. With this arrangement, it will be evident that rocking the screen to the left will result in raising the left hand side and lowering the right hand side instead of lowering the left hand side and raising the right hand side and that rocking the screen tothe right will result in raising the right hand side and lowering the left hand side instead of lowering the ri ht hand side and raising the left hand si o. This, however, does not result in any different kind of action u on the material being screened.

In igs. 6. and 7 there is shown a further modification of the manner of mountin the screen, wherein the pins8 are norma y in the same vertical planewith the corresponding pins 5, instead of being located inwardly with respect to the last mentioned pins. This results in maintaining the screening surface horizontal throughout the entire range of movement of the screen. As the screen is moved to one side or the other from the position shown in Fi 6, it is raised, but in a plane parallel with" that which it occupied before. As is the case with Fig. the ull lines in Fig. 7 indicate the no or inactive position of the screen while the dotted lines indicate the position which it occupies when oscillated upon its upper pivots 5.

In Fig. 8 there is shown a modification of the particular manner of mounting the screen illustrated in Figs. 1-4 inclusive. In this case, fiat s rings 27 are employed for, the suspending inks, the up er end of each spring being secured to its a jacent side rail 1 and thelower end being formed into an eye 28. which receives the appropriate pin 8 car ried by. the lugs 7.

In all forms of my invention I may use bum er blocks 29, preferably of rubber or simi ar yieldable material to relieve the magnet poles from impact by the armatures 15; and in all forms exce t that shown in Figs. 6 and 7, the ivota su port for. the outer end of each is latera y offset from the ivotal support for the inner end.

aving thus described my invention, what I claim is:

1. apparatus of1 the kind despribed compnsm a rectan ar an rt' rame a rectang ilar screei dispos e d said frame in the same plane thereof, pivoted links connecting said screen at each end to said supporting frame, electric magnets on the side rails of said supporting frame between said links, armatures carried by said screen opposite said magnets, cushio sprin s disposed between said screen an said rame to each side of said ma ets and means for energizing and deenergizing said magnets for oscillatm said screen.

2. Anapparatus 0 the kind described comprising a rectangular supportin frame a rectangular screen disposed wit in said frame in the same lane thereof, pivoted links connecting sai screen at each end to said supporting frame, the inner ends of said links being laterally oflset from the outer ends thereof, electric magnets on the side rails of said supporting frame between said links, armatures carried by said screen kind described- 1,4au,aea a in the same plane thereof, pivoted links conside of said electric magnets and means for necting said screen to said frame at each end energizing and deenergizi said eta and between the side rails thereof, centrally alternately for oscillating said screen within 10 disposed armatures carried by said screen said frame.

5 centrally disposed electric magnets carried In testimony whereof, I hereunto sflixmy by said frame, a cushioning spring disposed signature. between said screen and sa1d frame to each CHARLES RUPRECHT. 

